Sedimentary #layers w/ bands of hematite, magnetite(gray/black) & jasper(red) in banded iron formations in Michigan - Geology Wonder's Photo http://pic.twitter.com/ctsFdP5nIz
— jaime s. sincioco (@jaimessincioco) May 24, 2017
via Twitter https://twitter.com/jaimessincioco
May 24, 2017 at 11:31AM
No comments:
Post a Comment